Wyniki wyszukiwania - BazTech

1

FPGA-based 2D addressing mode in programmed matrix PWM for multilevel inverter control

Manai L., Hasni M. A. E., Armi F., Besbs M.

Przegląd Elektrotechniczny

|

2017

|

R. 93, nr 4

128--134

EN

Conventionally, control signals fed to the PWM inverters are produced by electronic hardware or microprocessor. The cost and complexity of hardware implementation are considerable and control algorithms differ for PWM for different levels and topologies is proposed. On-line computation in the microprocessor approach is laborious and time-consuming. These two approaches seem impractical when they are applied to PWM multilevel inverter control. In this paper, programmed matrix PWM based on two dimensional addressing modes for FPGA memories can solve the problems mentioned above and provides easy, fast and steady control. Experimental results are carried out to confirm the high performance of the proposed embedded PWM.

PL

W artykule zaproponowano programowalny macierzowy przekształtnik PWM bazujący na dwuwymiarowym adresowaniu pamięci FPGA. Otrzymano wbudowany moduł PWM znacznie prostszy od typowych rozwiazań.

2

A Simple Boost Shoot through Control for Single phase Quasi ZSI DC-DC Converters Based on Voltage Doubler Rectifier

Shobanadevi N., Krishnamurty V., Stalin N.

Przegląd Elektrotechniczny

|

2015

|

R. 91, nr 9

242-246

EN

The Z-source inverters are recent topological options proposed for buck–boost energy conversion with a number of possible voltage- and current-type circuit. This paper presents new step-up DC-DC converter topologies with improved efficiency, nearly twofold increased gain, over twofold boost factor and reduced ripple free output. The topology contains quasi ZSI (Impedance Source Inverter) which has one diode, two capacitors, two inductors are used to maintain continuous current on the primary side for reducing energy losses in the output, a single phase isolation transformer, and a voltage doubler rectifier (VDR). There are two operating modes shoot-through (ST) and non-shoot through (NST) modes. For controlling quasi ZSI (impedance source inverter), Pulse Width Modulation (PWM) with duty cycle ratio control method is used. By implementing the Simple boost control method of shoot- through technique is achieved in quasi ZSI (impedance source inverter), voltage boost factor and component stresses are considerably reduced when compared to the conventional method.

PL

W artykule zaprezentowano nową topologię przekształtnika DC-DC o zwiększonej skuteczności, zmniejszonych tętnieniach. Zastosowano dwa tryby pracy: shoot-through ST i non shoo through (NST). W układzie zastosowano podwójny układ prostowania VDR. Do sterowania przekształtnika ZSI wykorzystano układ PWM.

3

FPGA Based Implementation of Amplitude Modulated Triangular Carrier PWM

Streekanth C., Moni R. S.

Przegląd Elektrotechniczny

|

2013

|

R. 89, nr 7

41--44

EN

The amplitude modulated triangular carrier pulse width modulation method (AMTCPWM) is a natural sampled PWM method which can extend the linearity of the sinusoidal PWM (SPWM) to full range of the pulse dropping region and increase the dynamic range of the SPWM control. Any submission in the PWM theory with a specific performance target is mandatorily requires either a reference or a carrier modification. This paper presents a reprogrammable architecture to implement the AMTCPWM with perfect reproduction capability. The architecture is implemented using Spartan 6 family device LX45 using Modelsim 6.3 and Xilinx 13.2i.

PL

Metoda modulacji amplitudowej fali nośnej trójkątnej AMTCPWM umożliwia rozszerzenie możliwości klasycznej metody sinusoidalnej PWM SPWM. W pracy zaprezentowano wykorzystanie układów FPGA.